Pernicious Ports

Question 1

How many ports are potentially accessible on a modern computer?

Answer 1

131,072 ports

Question 2

What ports are associated with legacy NetBios API?

Answer 2

137-139

Question 3

What are the terms that IANA uses to refer to the following port ranges?

(1) 0 - 1023

Answer 3

well-known ports

Question 4

What are the terms that IANA uses to refer to the following port ranges?

(2) 1024 - 49151

Answer 4

registered ports

Question 5

What are the terms that IANA uses to refer to the following port ranges?

(3) 49152 - 65535

Answer 5

dynamic and/or private ports

Question 6

(T/F) IANA approves ports based on the application and intended use

Answer 6

true

Question 7

(T/F) There is little or no control over the use of a registered port

Answer 7

true

Question 8

(T/F) IANA does not endorse the use of a port or service even if the application is approved

Answer 8

true

Question 9

(T/F) Registered ports are controlled by IANA whereas unregistered ports aren’t

Answer 9

true

Question 10

(T/F) Port 445 is associated with Windows NetBios API

Answer 10

false

Question 11

(T/F) NetBios and SMB can be disabled in the Windows Registry

Answer 11

true

Question 12

(T/F) NetBios and SMB can be unbound from the network interface

Answer 12

true

Question 13

(T/F) NetBios and SMB can be blocked at a network firewall

Answer 13

true

Question 14

(T/F) Ports 135-139 are never used on Unix computers

Answer 14

false

Question 15

(T/F) Telnet and FTP services are relatively harmless so their ports should be left open

Answer 15

false